大田作物，指在大片田地上种植的作物﹐如小麦﹑水稻﹑高粱﹑玉米﹑棉花﹑牧草等。直接供给粮食，油料和衣物原料为主。露地种植，温室大棚里面的蔬菜等不算；烟草，中草药不算；木本的苹果，葡萄不算。
为了使这些大田作物能够安全越冬，防霜作业具有极端重要意义。
In order that the crops in open field could survive safely the winter frost prevention operation is of Paramount importance.
发现大田作物单产高低，基本上依附于六月份气温的高低变化；
The results showed that the yield per mu of the field crops basically depended on the change of the air temperature in June.
总之，磁场处理水对常见大田作物从宏观及微观水平上来说均有一定的影响。
In summary, magnetic treatment water has some effect on the crops, not only in macroscopical level but also in microcosmic level.
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